Scroll-machine



. Patented Nov. I, |898. C.-F.-SHOEMAKER.

SCROLL MACHINE. (Application ledf Nov. 23, 1897.) y

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OVG Q hl/ E h limm/ lfpmilllllll NITED STATES PATENT FFICE.

CHARLES F. SHOEMAKER, OF ALLEGHENY, PENN SYLFANIA.

sPEcImcATIoNferming part ef Lettere Patent No. 613,428, dated November 1, 1898; Application filed November 23,1897. Serial No. 659,553. (No model.)

To @ZZ whom it may concern:

Be it known that 1, CHARLES F. SHOE- MAKER, a citizen of the UnitedStates of America, residing at Allegheny, in the county of Allegheny and State of Pennsylvania,have invented certain new and useful Improvements in Scroll-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements inmachines for forming eyes in leaf-springs, and has for its object to provide novel and effective means whereby the eye may be formed at one operation and the mandrel automatically withdrawn from the eye to place the machine in position for the succeeding spring.

In' describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification and wherein like letters and figures of reference indicate similar parts throughout the several views, in which- Figure 1 is a rear elevation. plan view, partly in section. Fig. 3 is aperspective view of the machine. Fig. 4 is a perspective view, of the sliding bar. Fig. 5 is a perspective View ofthe clutch and bar and a portion of the spring' and shaft. Fig. 6 is a perspective view of a portion of the finished springl Fig. 7 isa perspective View of the revolving disk and the wrapping bar or pin. Figs. 8 and 9 are views of the respective ends. Fig. 10 is a cross-sectional view of a portion of the table.v Fig. 11 is a side elevation of a portion of the machine, showing the coolingbox for the mandrel-shaft in longitudinal section.

Referring now to the drawings by reference letters and figures, 1 denotes the table, and 2 the supporting-legs for same, each of which may be of any desired form and constructed of any suitable material. Suitably j ournaled at the rear of the table or of the frame thus formed by the table and supporting-legs is'a drivingshaft 3, which may befjournaled in the supporting-legs or in suitable bearings provided therefor and has loosely mounted thereon a driving-pulley 4, the hub of which carries a projecting pin 5, extending some distance beyond the pulley in close alinement with the driving-shaft 3, the purpose of which pin will Fig. 2 is a top be hereinafter more fully described. Also mounted upon this driving-shaft 3 are clutchdisks 6, through which passes a sliding bar 7, which operates in a groove provided therefor vin the driving-shaft 3. This sliding bar 7 is provided on it-s upper face with a centrally'- arranged recess or cut-away portion 8, which is adapted to receive the beveled end 9 of its operating-lever 10, which is fulcrumed to a pin 11, supported by the frame, and the end of said lever being connected to an auxiliary lever 12, which is attached to a treadle-lever 13 near its forward end, the rear end of said treadle-lever being pivotally attached to one of the supporting-legs or at any other desirable point. 'lhe-treadle-lever 13 is held in the raised position by means of a sti tension-spring 14:, connected thereto, and which may either be attached to the fulcrum-pin 11 or to the frame of the machine at any other desired point.

Secured to the end of the frame is a bracket 15, each end 16 of which is turned outwardly to form journal-bearings for the rocker-shaft 17, the said shaft having mounted thereon near its lower end a disk 18, near its center a disk 19, and on its upper end a disk 20, the

,latter having formedintegral therewith an arm 21, to which is pivotally attached the outer end of the lever 22,- the inner end of which is similarly connected to the end of the mandrel-shaft 23, which operates in suitable journal-bearings 24 25, secured to the top of the table, the latter of which has connected thereto a supply-pipe 26, through which a current of water may be passed into the bearings to prevent the mandrel'from becoming heated. 27 represents the mandrel, which is carried on the inner end of this shaft 23.

The disk 19 has alug 19a formed integral therewith, to which is connected one end of the spring 28, the opposite end being attached to the bracket 29, connected to the underneath side of thetable or at any other suitable point, thus serving to hold the mandrel in the position shown in Fig. 3, where it is at all times ready for operation ofthe machine to complete the eye on the spring.

The disk 18 carries a pin 18a, which engages in a slot 30 in a lever 31, having its rear end attached to a wheel 32, rigidly mounted on the end of the driving-shaft 3. Embedded in IOO the table l at a point directly opposite the mandrel is a guide or rest 33, upon which the spring 34 is placed to form the eye, and secured to lthe upper face of the table at a point directly opposite this rest 33 is a gage 35, against which the inner end of the spring 34 engages. On the opposite end of the drivingshaft 3 is secured a wheel 3G, to which is pivotally attached the one end of the lever 37, near the other end of which is provided a slot 38 to receive a pin 39 of the lever 40, which is attached to the shaft 4l, journaled in suitable brackets 42, secured to the underneath side of the table, said shaft having mounted thereon a gear wheel 43, which meshes with a smaller gear 44, that is rigidly mounted on the Wrapping-shaft 45, which is journaled on top of the table in suitable bearings 46, and carries on its inner end a disk 47, having a central recess 48 to receive the mandrel 27, and carrying eceenti'ically mounted on its same face a triangular-shaped wrapping-pin 49, which is directly under the mandrel 27 before the machine is operated to form the eye and when the mandrel is in engagement with the disk 47. For operating the sliding bar I attach to a suitable pin on the frame a stiff spring 50, which engages the outer end of the sliding bar and moves the same longitudinally with the shaft 3 to force the end of the sliding bar into engagement with the projecting pin 5 and revolve the shaft 3.

Operation: Assuming that all parts have been secured in their respective positions, as shown in Fig. l, the spring is placed on the rest or support 33, the end thereof having been previously heated, and passed between the mandrel 27 and wrapping-pin 49 until the end abuts against the gage or stop 35. The spring is then in position for forming the eye 5l, as shown in Fig. 6 of the drawings, and to-form this eye the operator places his foot on the treadle-lever 13, and by pressing downward on the same withdraws the lever l() (by reason of its connection with the treadlelever) from its seat in the recess 8 of the sliding bar 7. Vhen this lever 10 is thus withdrawn, the sliding bar 7 is free to operate in the groove of the driving-shaft, and the tension of the spring 50 against the end of the bar forces the saine inwardly along the shaft, so that the same will project alongside of and be engaged by the projecting pin 5, secured on the hub ofthe pulley 4, and by this means locking the pulley on the shaft, so as to cause the belt to revolve the same. This operation of the shaft 3 thereby communicates motion to the wheel 36 and operates the shaft 45 through the medium of the gears 43 44, the levers 37 and 40, and thereby operates the disk 47, which as it begins to revolve brings the wrapping-pin 49 into engagement with the heated end of the spring and, through the revolving of the disk 47,

causes the pin 49 to describe the arc of a circle,

reaching from the point a at the underneath side of the springs to b on the upper face'. This arc and also the position of the wrapping-pin when the eye is completed are fully shown in dotted lines in Fig. 10 of the drawings. By this movement of the pin 49 the heated end of the spring is wound around the mandrel 27 and completes the finished eye, as shown in detail, Fig. 6. Simultaneously with this operation the wheel 32, mounted on the opposite end of the shaft, has been turned by the said shaft, so as to move the lever 3l in a position to bring the pin 1S at the extreme end of the slot 30, and the pressure on the treadle being relieved the spring 14 elevates the same, thus allowing the tapered end 9 of the lever l0 to enter the recess 8 of the sliding bar 7, and as the said lever forces itself into the recess it withdraws the bar from its engagement with the projecting pin 5, so as to permit the belt to operate the pulley without revolving the shaft 3. At the same time the pin lt, being at the extreme end of the slot 30, as heretofore stated, is engaged by the lever 3l and forced in a forward direction, thus turning the rocker-shaft 17 to withdraw the mandrel from the eye of the spring and permitting the iinished spring to be lifted from the table or support. Vhen the foot is again placed on the treadle and the same is depressed to lift the lever l0 and permit the spring 50 to force the sliding bar again into engagement with the projecting pin 5 while simultaneous therewith, the spring 28 retractsthe rockershaft 17, operating the lever 22 and shaft 23 to force the mandrel into position for forming the eye on the succeeding spring.

By this arrangement and construction it will be observed that the complete eye is formed with a single operation and the operation of all parts is entirely automatic with the depressing and releasing of the treadle.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a machine of the character described, a table,a driving-shaft j ournaled to said table, a wrapping-shaft mounted on the top of said table and to one end thereof, a disk secured to one end of said wrapping-shaft and carry- IOO IIO

ing a wrapping-pin, a mandrel-shaft mounted on the top of said table and in alinement with the wrapping-shaft, a mandrel carried by one end of said mandrel-shaft, intermediate connections between the driving-shaft and the wrapping-shaft whereby the wrapping-pin is caused to describe the are of a circle, connections between the driving-shaft and the mandrel-shaft whereby longitudinal motion is imparted to mandrel to withdraw the same from the eye after the same has been formed, substantially as herein shown and described.

2. A machine for forming the eyes of seatsprings consisting of a wrapping-shaft mounted upon a suitable support, a disk secured to one end of said wrapping-shaft and carrying a wrappingpin, a drive -shaft mounted on said support, connection between the driveshaft and the wrapping-shaft wherebyv the wrapping-pin is caused to describe the arc of a circle, a mandrel-shaft mounted on said support and in alinement with said wrappingshaft and carrying on one end a mandrel, connections between the driving-shaft and the mandrel-shaft,whereby a longitudinal motion is imparted to the mandrel to withdraw the same when the eye is formed, substantially as herein shown and described.

3. A machine for forming the eyes of seatsprings, comprising a wrapping-pin, and a mandrel-shaf t, a suitable driving-shaft which carries a sliding bar adapted to operate in a recess in said shaft, a lever engaging said sliding bar and connected to the treadle so as to operate the bar to cause the same to lock the driving-pulley when the treadle is depressed andconnections between the wrapping-pin and the mandrel-shaft whereby the wrapping-pin is caused to describe the arc of a circle, while the treadle remains depressed,

and the mandrel-shaft is automatically withdrawn when the movement of the wrappingshaft is completed, substantially as shown and described.

4. In a device of the character described, consisting of a suitable support, a drivingshaft, a wrapping-shaft carrying on one end a disk, a wrapping-pin secured to said disk, connections between the drive shaft and wrappingfshaft whereby the wrapping-pin is caused to describe the arc of a circle, an automatically operated mandrel mounted on said support, and means for imparting a longitudinal motion to the mandrel to withdraw the same when the eye is formed, substantially as shown and described.

5. A machine for forming the eye in the end of a spring, comprising a suitable support, a wrapping-shaft mounted on said support and carrying on one end a disk, a wrapping-pin carried by said disk, a driving-shaft, connec tions between the driving-shaft and wrapping shaft, whereby the wrapping-pin is caused to describe the arc of a circle, a mandrel mounted on said support and in alinement with the" wrapping-shaftand means for imparting a longitudinal motion to the mandrel when the eye is formed, substantially as shown and described.

In testimony whereof I aix my signature in presence of two witnesses.

Y CHARLES F. SHOEMAKER. Witnesses:

A. M. WILSON, Trios. M. BOYD, .J r. 

